PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FS-33-PTransformer,power

Espey Mfg and Electronics Corp · NSN 5950-01-149-7020 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-149-7020 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-149-7020. Primary manufacturer part number: FS-33-P.
Features
  • Transformer,power — FSC 5950
  • Reliability Indicator: NOT ESTABLISHED
  • Winding Operating Current: 3.0 AMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 1.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Body Length: 2.000 INCHES NOMINAL IN
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
  • Terminal Type and Quantity: 8 WIRE HOOK
  • Winding Operating Voltage: 28.00 AC VOLTS NOMINAL AND 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power, cataloged under National Stock Number 5950-01-149-7020, is classified within Federal Supply Class 5950 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Espey Mfg and Electronics Corp. Government technical data includes 22 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-01-149-7020
Primary Part NumberFS-33-P
Item NameTransformer,power
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerEspey Mfg and Electronics Corp
StatusACTIVE
Reliability IndicatorNOT ESTABLISHED
Winding Operating Current3.0 AMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY
Center to Center Distance Between Mounting Facilities Parallel to Width1.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Length2.000 INCHES NOMINAL IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Terminal Type and Quantity8 WIRE HOOK
Winding Operating Voltage28.00 AC VOLTS NOMINAL AND 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE PRIMARY
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Thread Quantity Per Inch32 SINGLE GROUP
Body Height1.310 INCHES NOMINAL IN
Mounting Facility Quantity4 SINGLE GROUP
Winding Shielding MethodINTERNAL SHIELD GROUNDED TO CORE AND BROUGHT OUT TO TERMINAL SINGLE COMPONENT
Winding Function and Quantity1 PRIMARY AND 2 SECONDARY SINGLE COMPONENT
Nominal Thread Size0.138 INCHES SINGLE GROUP IN
Winding Operating Voltage6.54 AC VOLTS NOMINAL SINGLE COMPONENT SECOND SECONDARY
Inclosure TypeHERMETICALLY SEALED
Winding Operating Current2.0 AMPERES AC MAXIMUM SINGLE COMPONENT FIRST SECONDARY
Body Width1.500 INCHES NOMINAL IN
Frequency Rating380.0 HERTZ MINIMUM AND 420.0 HERTZ MAXIMUM SINGLE COMPONENT
Winding Operating Voltage28.20 AC VOLTS NOMINAL SINGLE COMPONENT FIRST SECONDARY
Center to Center Distance Between Mounting Facilities Parallel to Length1.500 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
3455-00-194-051010070 INTERCHANGEABLE
Cutter,milling,plain
Niagara Cutter Inc
5360-00-291-538240128 INTERCHANGEABLE
Spring
Sullair Corp
2910-01-276-148440128E INTERCHANGEABLE
Pump,fuel,electrical
Purolator Products Co Div Motor Components, Llc
2520-01-346-199440128 INTERCHANGEABLE
Power Takeoff,transmission
Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
3120-01-373-148540128 INTERCHANGEABLE
Bearing,washer,thrust
Paccar Winch Inc Dba Paccar Winch Division
5120-01-430-2971 INTERCHANGEABLE
Socket,socket Wrench
8465-01-565-403040128 INTERCHANGEABLE
Vest,hydration,tactical
Camelbak Products, Llc Dba Camelbak
4730-01-678-056940128 INTERCHANGEABLE
Plug,pipe
Fastenal Company Dba Fastenal Co
Cross-Reference Index
Part NumberManufacturer
FS-33-P Espey Mfg and Electronics Corp (USA)
FS-33-P Espey Mfg. & Electronics Corp. (USA)
40128 Coast/advanced Chip Magnetics, Inc. (USA)
902C6610-01-020 Ge Aviation Systems Llc Dba Ge Aviation Div Information Systems - Germantown (USA)
Related Parts
3455-00-194-0510INTERCHANGEABLE
CUTTER,MILLING,PLAIN
10070
5360-00-291-5382INTERCHANGEABLE
SPRING
40128
2910-01-276-1484INTERCHANGEABLE
PUMP,FUEL,ELECTRICAL
40128E
2520-01-346-1994INTERCHANGEABLE
POWER TAKEOFF,TRANSMISSION
40128
3120-01-373-1485INTERCHANGEABLE
BEARING,WASHER,THRUST
40128
5120-01-430-2971INTERCHANGEABLE
SOCKET,SOCKET WRENCH
8465-01-565-4030INTERCHANGEABLE
VEST,HYDRATION,TACTICAL
40128
4730-01-678-0569INTERCHANGEABLE
PLUG,PIPE
40128

Frequently Asked Questions

What is NSN 5950-01-149-7020?

NSN 5950-01-149-7020 is a Transformer,power, manufactured by Espey Mfg and Electronics Corp, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-01-149-7020?

NSN 5950-01-149-7020 has 4 cross-referenced part numbers: FS-33-P (Espey Mfg and Electronics Corp), FS-33-P (Espey Mfg. & Electronics Corp.), 40128 (Coast/advanced Chip Magnetics, Inc.), 902C6610-01-020 (Ge Aviation Systems Llc Dba Ge Aviation Div Information Systems - Germantown).

What NSN replaces 5950-01-149-7020?

There are 8 known substitutes for 5950-01-149-7020: 3455-00-194-0510, 5360-00-291-5382, 2910-01-276-1484 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FS-33-P?

Key specifications for FS-33-P: Reliability Indicator: NOT ESTABLISHED; Winding Operating Current: 3.0 AMPERES AC MAXIMUM SINGLE COMPONENT SECOND SECONDARY; Center to Center Distance Between Mounting Facilities Parallel to Width: 1.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Body Length: 2.000 INCHES NOMINAL IN. 22 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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